Extra Pure Calculations Flashcards
(8 cards)
1
Q
Sine rule
A
SinA/ a = sinB/ b
2
Q
Cosine rule
A
a^2 = b^2 + c^2 -2bc cosA
3
Q
Quadratic formula
A
-b +or- sqroot b^2 - 4ac / 2a
4
Q
Midpoints
A
(X1+x2/ 2 , Y1 + Y2 / 2)
5
Q
Equation of a line
A
(Y1 - y2) = m(x1 - x2)
6
Q
Calc for unit vector
A
1/ magnitude of vector x vector
7
Q
Cos(theta) x
A
X / magnitude of vector
8
Q
When does the binomial of (1+x)^n and a^n(1+ bx/ a)^n only work for
A
When |x|<1 or |bx/a|<1
